feat(abstract-eth): add ERC20Votes delegateBySig EIP-712 helpers #2402

Job	Run time
Generate merge base API spec	6m 46s
Generate head API spec	6m 46s
Check specs identical	4s
Generate vacuum reports for API spec	0s
Check breaking changes	0s
Linter Override	0s
API Spec Check	5s
	13m 41s

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